Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980esasp.157...71b&link_type=abstract
The second European International Ultraviolet Explorer (IUE) Conference, held 26-28 March 1980 in Tübingen, West Germany. Edited
Astronomy and Astrophysics
Astronomy
2
Chromosphere, Iue, Stellar Atmospheres, Stellar Coronas, Ultraviolet Astronomy, Carbon, Elastic Waves, Emission Spectra, Flux (Rate), Lyman Alpha Radiation, Radiative Transfer, Silicon, Stellar Winds, Thermal Conductivity
Scientific paper
Observations of alpha CMi (Procyon) obtained with the International Ultraviolet Explorer satellite were analyzed to determine the structure of the outer atmosphere. This analysis is used to examine the terms of the energy balance equation. Radiation losses exceed those from comparable regions of the solar atmosphere and dominate the energy balance of the atmosphere. The coronal temperature and pressure are 300,000 K and 2 X 10 to the 14th power cu/cm K. Line profiles from high resolution spectra are used to determine the nonthermal energy flux. Comparisons made between the required energy input and that expected from heating by acoustic waves show that, from observations and models, energy deposition by acoustic waves should be sufficient to account for the radiative losses.
Brown Adrian
Jordan Cathy
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